Add vCD 10.1 vcd_org_vdc fix note to changelog (#494)

* Add vCD 10.1 vcd_org_vdc fix note to changelog which was actually fixed with #489 by pulling in go-vcloud-director SDK version vmware/go-vcloud-director#293

CHANGELOG.md

@@ -16,6 +16,7 @@ configuration (when using `vcd_vapp_vm.network_name` and `vcd_vapp_vm.vapp_netwo
 `vcd_vapp_vm.network` blocks) [GH-478]
 * `resource/vcd_vapp_org_network` fix potential error 'NAT rule cannot be configured for nics with
   DHCP addressing mode' during removal [GH-489]
+* `resource/vcd_org_vdc` supports vCD 10.1 and resolves "no provider VDC found" errors [GH-489]
 
 DEPRECATIONS:
 * vCD 9.1 support is deprecated. Next version will require at least version 9.5 [GH-489]